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A145075
a(n) = [x^(5^n)] Q(x,n)^(n+1) where Q(x,n) = Sum_{k=0..n} (x^(5^k) + x^(2*5^k) + x^(3*5^k) + x^(4*5^k)) for n>=0.
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4
1, 4, 18, 172, 1881, 25644, 411488
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 6 11:04 EST 2009. Contains 170427 sequences.
AT&T Labs Research
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